Before moving a car, which action should you take first?

Before moving a car, the most crucial action is to ensure that the vehicle is completely stopped. This is fundamental for safety and control. When a car is stationary, the driver can assess the immediate surroundings properly, prepare to engage the vehicle's gears, and ensure that the area is clear of any obstacles or hazards.

Stopping allows the driver to take a moment to gather all necessary visual and auditory information regarding the environment. It creates a secure foundation from which to check mirrors, listen for other road users, and make informed decisions on how to proceed.

In the context of the other options, while looking in the rearview mirror, listening for traffic, and checking the fuel level are all important parts of vehicle operation, they should be performed once the vehicle is fully stopped. This ensures that the driver remains in full control of the vehicle at all times and can react appropriately to any unexpected developments.